feat: add multiplex to default muxers

This adds the possibility to set muxers via `options.muxer` in the constructor. 

BREAKING CHANGE: Prefer multiplex over spdy, as it works better with go-ipfs

package.json

@@ -38,19 +38,19 @@
   "homepage": "https://github.com/ipfs/js-libp2p-ipfs-nodejs#readme",
   "devDependencies": {
     "aegir": "^10.0.0",
-    "async": "^2.1.4",
+    "async": "^2.1.5",
     "chai": "^3.5.0",
     "pre-commit": "^1.2.2",
     "pull-stream": "^3.5.0"
   },
   "dependencies": {
     "libp2p": "~0.5.4",
     "libp2p-mdns": "~0.6.1",
-    "libp2p-multiplex": "~0.4.0",
+    "libp2p-multiplex": "~0.4.1",
     "libp2p-railing": "~0.4.1",
     "libp2p-secio": "~0.6.7",
     "libp2p-spdy": "~0.10.4",
-    "libp2p-swarm": "~0.26.17",
+    "libp2p-swarm": "~0.26.18",
     "libp2p-tcp": "~0.9.3",
     "libp2p-webrtc-star": "~0.8.8",
     "libp2p-websockets": "~0.9.2",
@@ -72,4 +72,4 @@
     "kumavis <kumavis@users.noreply.github.com>",
     "varunagarwal315 <varunagarwal315@gmail.com>"
   ]
-}
+}

src/index.js

@@ -11,6 +11,33 @@ const multiplex = require('libp2p-multiplex')
 const secio = require('libp2p-secio')
 const libp2p = require('libp2p')
 
+function mapMuxers (list) {
+  return list.map((pref) => {
+    if (typeof pref !== 'string') {
+      return pref
+    }
+    switch (pref.trim().toLowerCase()) {
+      case 'spdy':
+        return spdy
+      case 'multiplex':
+        return multiplex
+      default:
+        throw new Error(pref + ' muxer not available')
+    }
+  })
+}
+
+function getMuxers (options) {
+  if (process.env.LIBP2P_MUXER) {
+    const muxerPrefs = process.env.LIBP2P_MUXER
+    return mapMuxers(muxerPrefs.split(','))
+  } else if (options) {
+    return mapMuxers(options)
+  } else {
+    return [multiplex, spdy]
+  }
+}
+
 class Node extends libp2p {
   constructor (peerInfo, peerBook, options) {
     options = options || {}
@@ -23,16 +50,7 @@ class Node extends libp2p {
         webRTCStar
       ],
       connection: {
-        muxer: process.env.LIBP2P_MUXER ? (() => {
-          const muxerPrefs = process.env.LIBP2P_MUXER
-          return muxerPrefs.split(',').map((pref) => {
-            switch (pref) {
-              case 'spdy': return spdy
-              case 'multiplex': return multiplex
-              default: throw new Error(pref + ' muxer not available')
-            }
-          })
-        })() : [spdy],
+        muxer: getMuxers(options.muxer),
         crypto: [
           secio
         ]

test/libp2p.spec.js

@@ -138,6 +138,23 @@ describe('libp2p-ipfs-nodejs', () => {
     })
   })
 
+  it('create libp2pNode with multiplex only', (done) => {
+    const old = process.env.LIBP2P_MUXER
+    process.env.LIBP2P_MUXER = ''
+    PeerInfo.create((err, info) => {
+      expect(err).to.not.exist
+      const b = new Node(info, null, {muxer: ['multiplex']})
+      expect(b.modules.connection.muxer).to.eql([
+        require('libp2p-multiplex')
+      ])
+
+      if (old) {
+        process.env.LIBP2P_MUXER = old
+      }
+      done()
+    })
+  })
+
   it('mdns discovery', (done) => {
     nodeA.discovery.once('peer', (peerInfo) => {
       expect(nodeB.peerInfo.id.toB58String())